EP1265097A2 - Verfahren zum Steuern einer Flüssigkristallanzeige - Google Patents
Verfahren zum Steuern einer Flüssigkristallanzeige Download PDFInfo
- Publication number
- EP1265097A2 EP1265097A2 EP02011969A EP02011969A EP1265097A2 EP 1265097 A2 EP1265097 A2 EP 1265097A2 EP 02011969 A EP02011969 A EP 02011969A EP 02011969 A EP02011969 A EP 02011969A EP 1265097 A2 EP1265097 A2 EP 1265097A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- liquid crystal
- display
- color
- cell
- crystal cell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
- G02F1/13471—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells
- G02F1/13473—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells for wavelength filtering or for colour display without the use of colour mosaic filters
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/139—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent
- G02F1/1396—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent the liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell
- G02F1/1397—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent the liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell the twist being substantially higher than 90°, e.g. STN-, SBE-, OMI-LC cells
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/02—Composition of display devices
- G09G2300/023—Display panel composed of stacked panels
Definitions
- the invention relates to a method for controlling a Liquid crystal display, especially in a motor vehicle, with two active ones arranged one behind the other Liquid crystal cells, which are illuminated with transmitted light are.
- Liquid crystal displays of the above type are as DSTN displays known. Usually in one Liquid crystal cell represented a dot matrix while segments are displayed in the second liquid crystal cell be in the first cell because of the low Difficult to display the resolution. Such liquid crystal displays are controlled in such a way that each passive liquid crystal cell the color shift through the selected active liquid crystal cell compensated.
- the problem underlying the invention is a method of the type mentioned at the outset, by which with a liquid crystal display with two in a row arranged liquid crystal cells are two different allow colored ads to reach without this different colored light sources and corresponding Light boxes may be required.
- control voltage to change the color of the display the selected active liquid crystal cell so high is that there is no birefringence perceptible to the eye takes place in the controlled liquid crystal cell and therefore the display in the own color of the others, inactive liquid crystal cell appears.
- the display appears when activated with overvoltage yellow when using a negative DSTN display.
- a blue display is also possible by following one another development of the method according to the invention uses a positive DSTN display.
- the drawing shows a negative DSTN cell that made up two active liquid crystal cells 1, 2 is formed at which the areas to be displayed when controlled with normal voltage each white and with overvoltage control each appear yellow.
- both liquid crystal cells 1, 2 lie flat on top of each other.
- the rear liquid crystal cell 2 serves the representation of colored segments 3, while the first Liquid crystal cell 1 for displaying a dot matrix 4 is trained.
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
Abstract
Description
Claims (4)
- Verfahren zum Steuern einer Flüssigkristallanzeige, insbesondere in einem Kraftfahrzeug, mit zwei räumlich hintereinander angeordneten aktiven Flüssigkristallzellen, welche mit Durchlicht beleuchtet sind, dadurch gekennzeichnet, dass zur Veränderung der Farbe der Anzeige die Ansteuerspannung der jeweils aktiven Flüssigkristallzelle so hoch gewählt wird, dass keine mit dem Auge wahrnehmbare Doppelbrechung in der angesteuerten Flüssigkristallzelle erfolgt und die Anzeige daher in der Eigenfarbe der anderen, nicht aktiven Flüssigkristallzelle erscheint.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass von beiden Flüssigkristallzellen sich nicht überdeckende Anzeigebereiche mit überhöhter, eine Farbänderung herbeiführende Ansteuerspannung angesteuert werden.
- Verfahren nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, dass ein negatives DSTN-Display verwendet wird.
- Verfahren nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, dass ein positives DSTN-Display verwendet wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2001127492 DE10127492A1 (de) | 2001-06-07 | 2001-06-07 | Verfahren zum Steuern einer Flüssigkristallanzeige |
DE10127492 | 2001-06-07 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1265097A2 true EP1265097A2 (de) | 2002-12-11 |
EP1265097A3 EP1265097A3 (de) | 2005-02-02 |
EP1265097B1 EP1265097B1 (de) | 2008-10-08 |
Family
ID=7687396
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20020011969 Expired - Lifetime EP1265097B1 (de) | 2001-06-07 | 2002-05-29 | Verfahren zum Steuern einer Flüssigkristallanzeige |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1265097B1 (de) |
DE (2) | DE10127492A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7639210B2 (en) | 2005-10-31 | 2009-12-29 | Sharp Kabushiki Kaisha | Multi-depth displays |
US9244286B2 (en) | 2006-04-28 | 2016-01-26 | Sharp Kabushiki Kaisha | Display, instrument panel, optical system and optical instrument |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4028107A1 (de) * | 1990-09-05 | 1992-03-12 | Vdo Schindling | Fluessigkristallanordnung |
US5136406A (en) * | 1987-10-06 | 1992-08-04 | Asahi Glass Company Ltd. | Plural layer liquid crystal display device for a high density display |
US5680184A (en) * | 1994-04-12 | 1997-10-21 | Casio Computer Co., Ltd. | Color liquid crystal display device |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1036699A (en) * | 1974-02-28 | 1978-08-15 | Akio Moriyama | Electro-optical display device |
JPS53101296A (en) * | 1977-02-16 | 1978-09-04 | Seiko Epson Corp | Display unit |
JPS55166619A (en) * | 1979-06-15 | 1980-12-25 | Stanley Electric Co Ltd | Multilayer liquid crystal display device |
JPS5792311A (en) * | 1980-11-28 | 1982-06-08 | Sharp Corp | Guest-host type liquid crystal display element |
DE19603352A1 (de) * | 1996-01-31 | 1997-08-07 | Vdo Schindling | Anzeigeeinrichtung |
DE19915622A1 (de) * | 1998-05-23 | 1999-11-25 | Mannesmann Vdo Ag | Verfahren zur Darstellung veränderlicher Informationen |
-
2001
- 2001-06-07 DE DE2001127492 patent/DE10127492A1/de not_active Withdrawn
-
2002
- 2002-05-29 EP EP20020011969 patent/EP1265097B1/de not_active Expired - Lifetime
- 2002-05-29 DE DE50212849T patent/DE50212849D1/de not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5136406A (en) * | 1987-10-06 | 1992-08-04 | Asahi Glass Company Ltd. | Plural layer liquid crystal display device for a high density display |
DE4028107A1 (de) * | 1990-09-05 | 1992-03-12 | Vdo Schindling | Fluessigkristallanordnung |
US5680184A (en) * | 1994-04-12 | 1997-10-21 | Casio Computer Co., Ltd. | Color liquid crystal display device |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7639210B2 (en) | 2005-10-31 | 2009-12-29 | Sharp Kabushiki Kaisha | Multi-depth displays |
US9244286B2 (en) | 2006-04-28 | 2016-01-26 | Sharp Kabushiki Kaisha | Display, instrument panel, optical system and optical instrument |
Also Published As
Publication number | Publication date |
---|---|
DE50212849D1 (de) | 2008-11-20 |
EP1265097B1 (de) | 2008-10-08 |
DE10127492A1 (de) | 2003-01-09 |
EP1265097A3 (de) | 2005-02-02 |
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